The blue ribbons of varying sizes popping up around Marblehead are lifting the spirits of a local 13-year-old girl battling an aggressive form of bone cancer.The ubiquitous ribbons can be found atop and on cars, including at least one police cruiser; in flower pots, on trees, fence posts, poles and doorways; and outside storefronts, churches, homes and town buildings.All of this is showering love and support on Megan, a Marblehead Community Charter Public School seventh-grader diagnosed with osteosarcoma.“She was diagnosed with osteosarcoma back in August last year and has been battling it ever since,” wrote Megan's family, whose last name is being omitted per their request, in a statement. “Across the board, her nurses, doctors, friends and neighbors have been amazed at her indomitable spirit and grace through all that cancer has dealt her.”Friends and family started the ribbon campaign two weeks ago, but it quickly bloomed into a town-wide effort, with residents and business owners viewing the show of support as an avenue to help Megan's family.Louisa Greene is one of four women, also known as the “Ribbon Ladies,” who began the campaign. She is also serving as the family's spokesperson and described the town's support as amazingly generous.“We all are just blown away. We started this with a few friends and family, and everyone in town has been fabulous,” she said. “It speaks to how close knit the town is, coming together for a child in their community.”Blue is the darling of Megan's favorite colors. The color permeates trust, loyalty, wisdom and confidence, traits indicative of her personality and character, the family's statement reads. She is selfless, too.“In the spirit of giving back, Megan wanted to help other kids facing health challenges,” her family said. “She and Marblehead Charter School just hosted an event, ‘Rock for Meg,' that raised thousands of dollars for a charity that makes kids' stays at Massachusetts General Hospital's pediatric floor more fun.”On Friday, Megan will present the charity, Angels Above, with a check during a school event.Greene said Marbleheaders continue to reach out about obtaining ribbons by the hundreds.“Dogs are taking walks with blue bows, and last Friday, many of the school children in town wore blue to school to show their support,” wrote the family. “The idea has even spread to family and friends across the world.”In recent days, Marblehead's Fire and Police departments approached the family, asking if they could also show their support. Since that inquiry, police cruisers and fire engines now sport blue ribbons and bows.In Village Plaza, two huge signs, urging Megan to “Never, ever give up,” have been installed.“We are giving blue ribbons to everyone who wants to help, but then some people are doing this on their own, too,” Greene said. “People are going through their closets and finding ribbons.”The communal displays of love toward Meghan extend beyond Marblehead's borders, spilling into Lynn, Swampscott and Salem. In recent days, virtually every post and pole along Lynn Shore Drive has been adorned with a blue bow.“She loves it, and it has really lifted her spirits, and it's wonderful that she can see how much love there is for her in her own town and community,” Greene said.